<!DOCTYPE html>
<html>

	<head>
		<meta http-equiv="Content-Type" content="text/html">
		<meta charset="utf-8" />
		<meta http-equiv="X-UA-Compatible" content="IE=edge" />
		<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
		<title></title>
	</head>

	<body erke-hide>
	</body>
	<script>
		/**
	 * @param {string} J
	 * @param {string} S
	 * @return {number}
	 */
	var numJewelsInStones = function(J, S) {
	    var count=0;
	    for(var i in S){
	    	if(J.indexOf(S[i])>=0){
	    		count++;
	    	};
	    };
	    console.log(count);
	    return count;
	};
		var res = new numJewelsInStones("aA","aAAbbbb");
	</script>

</html>